Hair curlers



Jan. 27, 1959 s. r-zboLE HAIR CURLERS F iled Dec. 1, 1955 FIG. A

FIG. 6

FIG. 8

FIG.7

United States Patent 2,870,712 HAIR URLERS Samuel F. Cole, Washington,D. (3.

Application December 1, 1953, Serial No. 395,420 11 Claims. (Cl. 132-41)This invention relates to hair-curlers and, more spe cifically, todevices of this character which are especially adapted for personal usein connection with the so-called home permanents. The invention is alsoadapted for professional use and is characaterized by a rotatablehairwinding member, a bifurcated support for the hair-winding member, ahair-clamping bail employing novel hinging means, longitudinallyoperable means for simultaneously securing and/or releasing the bail andthe hairwinding member, and eccentrically operable means forautomatically securing the hair-winding member against the accidentalunwinding thereof.

The objects of this invention are:

To provide a hair-curler for either home or professional use which willbe convenient and rapid to operate; to provide a hair-curler havingmeans whereby the support for the hair-winding member is held inoperating position simultaneously with the rotation of the hair-windingmember; to provide a hair-curler wherein the hair-winch ing member isautomatically secured against accidental reverse rotation and theresulting unwinding; to provide a hair-curler wherein the hair-windingmember may be easily locked and/or released in close contact with thescalp; and to provide a hair-curler which is susceptible of fabricationfrom either plastic or metal. Other objects will become apparent uponthe following full disclosure of my invention.

in the drawings, wherein similar reference characters indicatecorresponding parts throughout the several views:

Figure 1 is a plan, view of the hair-curler, the hairwinding memberbeing shown in the free or unlocked position, and the bail disengagedand partly open, the extreme open position of the bail being indicatedin broken lines.

Figure 2 is a central longitudinal horizontal sectional view of theconstruction shown in Figure 1, the parts being shown in the closedposition. r

Figure 3 is a transverse section on line 33 of Figure 2.

Figure 4 is a transverse section on line 44 of Figure 2.

Figure 5 is a transverse section on line 5-5 of Figure 2.

Figure 6 is a fragmental side elevational view of a portion of thestructure shown in Figure 1, a part being in section to show amodification.

Figure 7 is a transverse section on the line 7-7 of Figure 9.

Figure 8 is a transverse section on the line 88 of Figure 9 Figure 9 isa fragmental view, largely in section, corresponding in part to Figure2, but showing modifications.

Referring to the drawings, the numeral 1 denotes a rotatablehair-winding member upon which the tresses are wound for curling.(Hereinafter, the term hairwinding member is replaced with the termmandrel which is used to denote a winding member, a spool, or theequivalent.) The mandrel-ends 1' and 1" are journaled in the bearings 2'and 3 respectively, the said bearings being formed in the annularmembers 4 and 5 which are hereinafter termed yoke arms 4 and 5. Theseyoke arms are integral with the longitudinal supporting bar 6 and,combined therewith, comprise, an elongated yoke coextensive with themandrel, wherein the mandrel is supported, the mandrel being bothrotatable and longitudinally slidable within the bearings.

Adjustments-of the mandrel are effected by means of the knurdled knobs 7and 7, the inner faces of these knobs containing the annular grooves 8and 8' respectively. These grooves form the bosses 9 and 9 respectivelywhich are concentric with their respective knobs, the latter beingattached to the mandrel Within the cooperant recesses 10 and 10' in themandrel ends 1' and 1 respectively. The width of the grooves 8 and 58'is sufficient to also accommodate therein the tapered annular flanges 11and 11' respectively, these flanges forming longitudinal protuberanceson the outer faces of the yoke arms 4 and 5.

The supporting bar 6 is coextensive with the mandrel and in spacedrelation thereto, thus providing suitable clearance, indicated by thenumeral 12, in which the rolled tresses may be acornmodated. Supportingbar 6 is formed with the longitudinal prolongations 13 and 13 integralwith the ends of the yoke and which comprise curler-supports. Thesesupports are substantially coextensive with the knobs 'i and 7respectively and their placement in close proximity to the knobs insurestheir interposition between the operators thumbs and forefingers duringthe adjustment of the mandrel-thus providing for the support of thecurler.

As hereinbefore mentioned, the mandrel 1 is both longitudinally androtatably adjustable for alining the cooperant members and for windingthe tresses respectively. Thus, the longitudinal adjustment of themandrel inwardly alines and locks the hereinafter described hairclampingbail 2t} and simultaneously engages the members of the followingdescribed mandrel-lock 14. The said lock comprises a mandrel controlmeans formed in the cooperant surfaces of the mandrel and its bearing inone end of the hair-curler by means of which the accidental reverserotation of the mandrel is automatically prevented during the Winding ofthe tresses. The longitudinal adjustment of the mandrel outwardly,however, releases the bail and simultaneously disengages the followingdescribed mandrel-stop 15, of the mandrel-lock 14, thereby freeing themandrel from further operation of the automatic mandrel-lock forrotation in either direction as, for example, when the curled tressesare to be unwound from the mandrel.

The above defined mandrel-lock 14 is associated with the yoke-arm 5 andthe mandrel-end 1" and comprises the. circumferential groove orball-race 14 (Fig. 2) which is formed in the mandrel-end 1"; thecooperant groove 16 which is a recess formed within the bearing in theyoke-arm 5 eccentric to the race 14' (Figs. 2 and 5); and the floatingmandrel-stop 15, the latter being a roll able stop adjustably confinedbetween the cooperant cams 14" and 16'. Mandrel-stop 15 is spherical incontour and may be formed of any suitable material. Where a resilientmandrel-locking member is'required, rubber or its equivalent may beindicated.

The ball-race 14', and the eccentric groove 16 are of graduated orsloping depths to form the cams 14" and 16' respectively.

The depth of the circumferential race 14 is greater on one side than onthe other, thus imparting a transverse incline to the bottom of the saidrace resulting in the formation of the cam 14" by means of which thestop 15 is propelled from the ball-race 14' into the groove 16 inresponse to the inward slidable adjustment of the mandrel.

ment of the mandrel-stop 15 within the groove 16; and secondly, in theforcing of the stop 15 into simultaneous frictional engagement with thecoacting earns 14 and 16' in automatic response to the reverse rotationof the mandrel.

Mandrel 1 is preferably tapered between its journaled ends as indicatedby the numeral 17, the said taper extending from its flared outer endsinwardly to the center of the mandrel, thus augmenting the clearance forthe tresses hereinbefore described in connection-with the supporting bar6. The mandrel is also formed with the,

longitudinal corrugations 18 which are coextensive with the taper 17,and which provide ventilation for the hair which may be wound upon themandrel.

One side of the mandrel is formed with the longitudinal flat 19 whichcooperates with the correspondingly contoured hinged-bail, orhair-clamp, 20 to fasten the ends of the tresses to the mandrel as apreliminary to the operation of the curler, the bail being hinged to themandrel at one end of the hair-curler. The flat 19 forms a longitudinalseat coextensive with the'corrugations 18 and includes provisions forthe hereinafter described bailhinge and dual bail-mandrel fastener(Figs. 1,2, and 3).

The hinging of bail 20 involves the use of a novel balland-fincombination (Figs. 2 and 4) whereby the bail is permanently anchored tothe mandrel, at one end thereof, and its movement limited to an outwardswing. This hinge comprises in part a thin sectoral fin 21 forstabilizing the bail, the said fin being formed on the hinged end of thebail 20 and housed within the narrow correspondingly shaped recess 22 inthe mandrel and, in part, a slotted ball-shaped bail-bearing 23, thebearing being pivotally confined within the cooperant concavity 24(hereinafter termed bearing-seat 24), the concavity being located in theinner end of the bore 25 in mandrel 1. The recess 22 extendslongitudinally inward from the surface of the mandrel, in line with thefin 21 and into the bore 25, providing a support for the fin 21 duringits outward swing. The bore 25 extends transversely through the mandrelto intersect the fiat bail-seat 19 at the juncture of the fin 21 withthe bail 20. The bearing 23 is formed with the slot 26 (Fig. 4) andprojects through seat 24, the extent of the protrudent portion 23' beingequal to the depth of the slot 26 in the said bearing. The adjacentunder edge 21 of the fin 21 is firmly attached within the slot 26, as bycementing, to the bearing 23, thus forming a unitary bail which issecureagainst displacement. A closure member in the form of the plug 27 isprovided for the bore 25, the plug being recessed as indicated by thenumeral 28 to accommodate the fin 21 when it is in extended position.

The inner periphery of bearing 2, in the yoke-arm 4 at the opposite endof the hair-curler, is formed with the combined annular head 29 and theparalleling annular groove 30 (Fig. 2), the latter being formed in thebearing 2 interiorly of the former, the combined formations comprisingan annular keeper having a revertant cross-section for engagement by thebail-fastener 31, the lath?! being 4 i an enlargement in the form of arounded protrusion integral with the free end of bail 20 and adapted forengagement with the said annular keeper and to coact therewith in a dualcapacity to simultaneously secure the free end of the bail and themandrel against accidental longitudinal movement, the fastener. 31 beingresponsive to the longitudinal adjustment of mandrel 1 for itsengagement with, and/or its release from, the groove 30. In theengagement of the fastener 31 with the groove 30, the fastener is firstdepressed in its passage over the bead 29-thus necessitating theadequate clearance which is provided by the cooperant recess 32 (Figs. 2and 3) in the mandrel 1.

The operation of the embodiment of the invention thus far described isas follows:

During the rotation of the mandrel, the curler is held with the edge ofthe supporting bar 6 toward the operator. The mandrel is first adjustedlongitudinally outward to simultaneously disengage both the mandrel-stop15 and the bail-fastener 31-the former from the cam 16' and the latterfrom the keeper 2930. With the mandrel in this position, it may befreely rotated in either direction and the bail 20 may be opened toadmit the ends of the tresses which are to be curled, the said end ofthe tresses being inserted between the flat of mandrel 1 andthe bail 20.

After the tresses have been clamped in the curler, the bail 20 isfastened by the inward longitudinal adjustment of the mandrel, the saidadjustment being accompanied by the simultaneous transverse adjustmentof the circumferential race 14 with reference to the eccentric groove 16and to the stop 15, whereby the stop is brought into frictional contactwith the cams 14 and 16. When thus engaged, the stop 15 functionsautomatically in response to the direction of the rotation of themandrel--either by frictionally engaging the cams 14 and 16 to preventthe reverse rotation of the mandrel or by releasing the mandrel forforward and/or reverse rotation. Thereupon, and until any given windingoperation is completed, the mandrel may be freely rotated to wind thetresses, constantly insured against accidental reverse rotation by theaction of the cams 14" and 16', within the race 14' and within thegroove 16 respectively, which automatically wedge the stop 15 betweenthe opposed surfaces of the said race and the groove to effectivelyfastenor retard the mandrel.

The release of the mandrel-stop 15 is automatically effected by thelongitudinal adjustment of the mandrel outwardlyresulting either in thecompression of the stop, when it is composed of a yielding material suchas rubber, orWhen it is composed of a more rigid material, by itsdisplacement in the direction of its releasement, this displacementbeing induced through the cooperation of the coacting members.

The tresses may be wound as tightly as desired and the winding operationmay be interrupted without loosening the partly wound tresses. The curlsmay be released from the mandrel by its longtudinal adjustment asindicated above, whereby the stop 15 is releasedfrom frictionalengagement with cam 16'.

Figure 6 illustrates a modification of Figure 1 which is especiallyadapted for professional use where continuous employment is commonpractice. This embodiment of the invention may advantageously employmetal in its construction and differs from the preceding curler only inthat a resilient mandrel-stop is employed to insure positive frictionalengagement of the cooperant members.

This is accomplished by employing the modified yokearm 33 wherein theeccentric race 34 contains the seat 35 for the coiled resilient member36. The free end of the resilient member 36 contains the bearing member37 which engages the ball-shaped stop 38, maintaining the latter incontact with the mandrel.

The operation of this embodiment is identical with that of Figure 1.

Figures 7 to 9 inclusive illustrate a modification of Figure 1 wherein aplurality of eccentric grooves, and a corresponding plurality ofrollable stops 40, are employed to insure greater sensitivity in theoperation of the curler. In the modification here presented, theposition of the eccentric grooves 39 and the circumferential race .40 isreversed with reference to the positions occupied .by their counterpartsin Figure 2, The longitudinal axes of the presently considered eccentricgrooves 39 are circumferentially alined in spaced relation in thesurface of the mandrel-end 41, with the direction of their angularityreversed, as above stated. Likewise, the direction of the angularity ofthe circumferential race 42, which is formed within the yoke-arm 43, iscorrespondingly reversed, the greater depth of race 42 being at itsouter end, the race and grooves shown in the mandrel and in the yoke-armrespectively of Figure l are here formed in the yoke-arm and in themandrel respectively.

The spherical bail-bearing 23, of Figure 2, is here replaced by the disc44 which is pivotally confined within the cooperant concavity 45, thelatter being situated in the inner end of the bore 46 which extendstransversely through the mandrel. The lower edge 47 of the fin 47, atthe hinged end of the bail 48, is attached to the disc within the notch49 in the lower edge thereof, the fin being operable within the sectoralrecess 56 in the mandrel d ll. The bore as contains the slottedclosuremember 51, similar to plug 27, Figure 2. The remaining members ofthe device are identical with their counterparts in the first disclosedembodiment.

The operation of this modification corresponds to that of the firstembodiment. The cam-like action of the eccentric grooves of eachembodiment, in combination with the similar action of thecircumferential races, depends ultimately upon the contours of the camsof these coacting members, and are subject to such modifications as maybe indicated.

The foregoing disclosures are not to be considered as limitations uponthe inventive thought which forms the basis of this application, butmerely as illustrative of the principles involved. Numerous adaptationsand modifications of the structures disclosed are possible withoutdeparting from the spirit of my invention and I claim all suchadaptations modifications which fall within the scope of the appendedclaims.

Having thus disclosed my invention, I claim:

1. A hair-curler comprising in combination a slidable hair-windingmember adapted for forward and reverse rotation, 21 support for thehair-winding member coextensive therewith, a piurality of grooves ofgraduated depths in one end of the hair-curler, one of the said grooveshaving the form of a circumferent race concentric with the hair-windingmember, the other of the said grooves being a recess eccentric to thecircumferent race, a spherical stop for the hair-winding member confinedbetween the circumferent race and the eccentric recess, the saidgraduated depths of the grooves forming cams for aligning the stop inresponse to the sliding adjustment of the hair-winding member and forfrictional engagement of the stop with the coacting grooves in responseto the reverse rotation of the hair-winding member, a bail hinged to thehair-winding member, a fastener for the bail and for the hair-windingmember in the support at the opposite end of the hair-curler, the bailand the spherical stop being simultaneously controlled by thelongitudinal adjustment of the hair-winding member.

2. A hair-curler comprising in combination a slidable mandrel rotatablymounted for hair Winding and unwinding, a support for the mandrel inspaced relation therewith,- a mandrel-lock formed on one end of thehaircurler and comprising a groove of graduated depth in the mandrel, acooperant groove of graduated depth. in the support, cams formed withinthe grooves by the graduated depths thereof, and a mandrel-stopadjustably confined between the cams, the stop being responsive to thesliding adjustment of the mandrel for adjustment within the grooves, andautomatically responsive to the unwinding of the mandrel forsimultaneous frictional engagement with the grooves, a hair-clampingbail hinged to the mandrel, a fastener integral with the free end of thebail and adapted for engagement with the said support to secure the bailand the mandrel against longitudinal displacement, and a keeper for thefastener formed in the support on the opposite end of the hair-curler,the engagement of the fastener being controlled by the longitudinaladjustment of the mandrel.

3. A hair-curler comprising in combination a yoke, mandrel bearings inthe arms of the yoke, a slidable man.- [drel rotatably mounted in thebearings and adapted for hair winding and unwinding, a vvcircumferent:ball-race in one end of the mandrel, an arcuate groove in the cooperantmandrel bearing, the arcuate groove being eccentric tothe circumferentrace, and a spherical stop for the mandrel confined between theball-race and the groove, the said race and groove being of graduateddepths for the actuation of the stop in accordance with the requirementsthereof, the stop being adjustable within the arcuate groove in responseto the slidable adjustment of the mandrel, and being in simultaneousfrictional engagement with the ball-race and the groove in automaticresponse to the unwinding of the mandrel, a hair-clamping bail hinged tothe mandrel at the said end of the hair-curler, a dual bail-mandrelfastener on the free end of the "bail, and a keeper for the fastenerformed within. the bearing at the opposite end of the hair-curler.

4. A hair-curler comprising in combination a yoke having mandrelbearings in the ends thereof, a slidable mandrel mounted in the saidbearings, a plurality of spaced recesses in the end of the mandrel atone end of the hair-curler, a circumferential groove in the CO? operantmandrel bearing," the recesses being circumferentially disposed inalinement with the circumferential groove, the bottoms of the spacedrecessesbeing eccentric to the circumferential groove, a plurality ofrollable mandrel-stops, one of the said stops being confined betweeneach recess and the coacting circumferential groove, the spaced recessesand the circumferential groove being of graduated depths to form camsfor actuating the stops, the stops being responsive to the slidingadjustment of themandrel for alinement within the respective spacedrecesses and to the reverse rotation of the mandrel for automaticfrictional engagement therewith, a unitary hair-clamping bail hinged tothe mandrel at the said end of the hair-curler, a fastener for the bailand the mandrel integral with the free end of the bail, and a bailkeeper in the mandrel bearing in the opposite end of the hair-curler.

5. A hair-curler comprising incombination an elongated yoke havingmandrel bearings in the ends thereof, a sliding mandrel journaled withinthe said bearings and adapted for forward and reverse rotation, acircumferent groove within the mandrel hearing at one end of thehair-curler, a plurality of spaced recesses in the cooperant journaledend of the mandrel, the bottoms of the said recesses being eccentric tothe circumferent groove, a corresponding plurality of floatingmandrel-stops oper: able between the circumferential groove and thespaced recesses, the said stops being responsive to the slidableadjustment of the mandrel for their adjustment within the spacedrecesses and automatically responsive to the reverse rotation of themandrel for simultaneous frictional engagement with the circumferentgroove and the spaced recesses, adjusting knobs on the ends of themandrel, hair-curler supports integral with the yoke and protrudentlongitudinally therefrom in spaced. relation to the knobs, ahair-clamping bail hinged to the mandrel at one end of the hair-curler,a dual bail-mandrel fastener comprising an enlargement on the free end.of the hail, the said enlargement being adapted for frictional ens.

gagement with the cooperant bearing, the latter containmg an annularinterior groove and forming a keeper to accommodate the bail-mandrelfastener.

, 6. A hair-curler comprising in combination a slidable mandrel adaptedfor forward and reverse rotation, a mandrel support comprising anelongated yoke coextensive: with the mandrel and having a bearing ateach end thereof, mandrel-locking means comprising a circumferentball-race of graduated depth in the mandrel at one end of the yoke, agroove of graduated depth within the cooperant mandrel bearing inalinement with, and eccentric to, the circumferent race, a resilientstop for the mandrel operable between the circumferent race and theeccentric groove, the circumferent race being responsive to the slidingadjustment of the mandrel for the adjustment of the stop within theeccentric groove, the eccentric. groove being automatically responsiveto the re verse rotation of the mandrel to force the stop intofrictional engagement with the circumferent race, the stop beingresponsive to the graduated depths of the circumferent race and theeccentric groove, adjusting knobs on the ends of the mandrel,hair-curler supporting members integral with the yoke and coextensivewith the knobs, a bail hinged to the mandrel at the said end of theyoke, a dual functioning bail-mandrel fastener integral with the freeend of the bail, and a keeper for the fastener formed within the mandrelhearing at the opposite end of the yoke.

7. A hair-curler comprising in combination an elongated yoke withbearings in the ends thereof, a slidable mandrel journaled within thesaid bearings and adapted for forward and reverse rotation, amandrellock on one end of the hair-curler, the said lock comprisingcooperant grooves of graduated depths in the mandrel and in the yoke,one groove being a circumferential race, the cooperant groove being arecess eccentric to the circumferential race, a mandrel-stop adjustablyconfined between the circumferential race and the eccentric recess, themandrel-stop being responsive to the graduated depths of the grooves foradjustment therein; to the slidable adjustment of the mandrel foradjustment within the eccentric recess; and to the reverse rotation ofthe mandrel for frictional engagement therewith, a bail hinged to themandrel, a dual-acting fastener for the bail and for the mandrel, thesaid fastener being integral with the free end of the bail, a keeper forthe fastener formed within the yoke on the opposite end of thehaircurler, adjusting knobs on the ends of the mandrel, and

curler-supporting members integral with the ends of the y yoke andadapted for engagement simultaneously with the rotation of the mandrel.

8. A hair-curler comprising in combination a mandrel support, a slidablemandrel journaled within the support and adapted for forward and reverserotation, a mandrellock on one end of the hair-curler, the said lockcomprising coacting cam-bottomed grooves in the mandrel and in themandrel support at one end of the hair-curler, one of the grooves beinga circumferentially disposed race, the other of the said grooves beingeccentric to the circumferentially disposed race, a floating mandrelstopconfined between the grooves and a resilient member in engagement withthe stop, the circumferential race being responsive to the slidingadjustment of the mandrel for adjusting the stop within the eccentricgroove, and

the eccentric groove being automatically responsive to the reverserotation of the mandrel for forcing the step into frictional contactwith the circumferential race, a bail hinged to the mandrel on the saidend of the haircurler, a resilient fastener integral with the free endof the bail, an annular keeper for the fastener within the opposite endof the mandrel support and coextensive with the knobs, the curlersupport being adapted for operation simultaneously with the operation ofthe mandrel knobs.

:9. A hair-curler com'pris ingin combination an elongated yoke providedwith mandrel bearings in the ends thereof, a slidable mandrel journaledwithin the mandrel bearings and adapted for forward and for reverserotation, a mandrel lock on one end of the yoke, the said lockcomprising a circumferential, cam-bottomed ball-race formed within themandrel bearing, a plurality of cam-bottomed recesses formed in thecooperant end of the mandrel and circumferentially disposed in spacedalinement, the said recesses being eccentric to the circumferentialball-race, a floating mandrel-stop confined between each of the recessesand the circumferential ball-race, the said ball-race being responsiveto the sliding adjustment of the mandrel for adjusting the floatingmandrel-stops in the respective recesses, the said recesses beingautomatically responsive to the reverse rotation of the mandrel to forcethe floating mandrel-stops into frictional contact with the cams, knobsattached to the ends of the mandrel, hair-curler supporting membersintegral with the ends of the yoke and projecting longitudinallytherefrom in spaced relation to the knobs, a bore extending transverselythrough the mandrel at the said end of the hair-curler, a bail hinged tothe mandrel, the hinge of tthe said bail comprising a bearing memberintegral with the bail and pivotally mounted within the bore, a fastenerfor the bail and the mandrel, the

i said fastener being an enlargement of the free end of the bail, and akeeper for the fastener comprising an annular recess in the mandrelbearing at the opposite end of the hair-curler. L

10. A hair-curler comprising in combination an elongated yoke havingmandrel bearings in the ends thereof, a mandrel journaled within thesaid bearings and adapted for hair winding and unwinding, a mandrelcontrol means in one end of the hair-curler comprising a cam-bottomedball-race in the mandrel concentric with the longitudinal axis thereof,a cam-bottomed recess within the cooperant mandrel bearing, the recessbeing in alinement with, and eccentric to, the concentric ball-race, afloating stop for the mandrel confined between the cam of the race andthe cam of the recess, the mandrel being slidable within its hearings toadjust the mandrel-stop within the eccentric recess, the cam of theeccentric recess being automatically responsive to the unwinding of themandrel to force the mandrel-stop into frictional engagement with theball-race, adjusting knobs attached to the ends of the mandrel,hair-curler supports integral with the ends of the yoke and protrudentlongitudinally therefrom in spaced relation to the knobs, the saidsupports being adapted for engagement simultaneously with the rotationof the mandrel, a bore extending transversely through the mandrel, abail hinged to the mandrel at the said end of the hair-curler, afastener for the bail and the mandrel integral with the free end of thebail, a keeper for the fastener formed within the yoke at the oppositeend of the hair-curler, thehinge of said bail comprising a bearingmember integral with the bail and pivotally mounted within the bore.

11. A hair-curler comprising in combination an elongated yoke, alongitudinally adjustable mandrel within the yoke and adapted forforward and reverse rotation, a lock for the mandrel comprisingcooperant grooves in the mandrel and in the yoke, a rollable stopconfined between the said grooves, one of the grooves being acircumferential race of graduated depth, the cooperant groove being arecess of graduated depth and eccentric to the circumferent race, themandrel being longitudinally adjustable to adjust the mandrel-stopwithin the eccentric recess, the said eccentric recess beingautomatically responsive to the reverse rotation of the mandrel to forcethe mandrel-stop into frictional engagement with the coactin'gj grooves,mandrel-adjusting knobs on the mandrel, hair-curler supporting membersintegral with the yoke, a bore in one end of the mandrel, a sectoralrecess in the mandrel and intersecting the said bore, a hair-clamp;

9 ing bail hinged to the mandrel, a fastener for the bail and themandrel integral with the free end of the bail, a keeper for thefastener formed within the cooperant bearing, the hinge of the said bailcomprising a bearing member and a cooperant fin integral with the hail,the bearing member being mounted within the said bore and the fin beingmounted within the sectoral recess.

References Cited in the file of this patent UNITED STATES PATENTSSterling June 14, 1932 Binder Dec. 4, 1934 Soley Dec. 17, 1935Cofifelder Feb. 25, 1936

